Bienvenidos al Posgrado en Producción Animal

The objective of this study was to estimate (co)variance components for reproductive traits and genetic correlations with weaning weight (WW) in Zebu cattle in Cuba. Data for 51,193 calvings of 17,890 cows in 48 herds were used. The pedigree file included 23,903 individuals. In order to estimate genetic correlations between WW and reproductive traits, 67,829 records were used, of which 19,768 were for WW and 48,061 for reproductive traits. Univariate and bivariate models were applied using the REML procedure of the ASREML program. Heritability for reproductive traits was low (0.01 to 0.09). Genetic correlations between days open (DO) were high only for the first three births (0.92 to 0.99) and low between these and later ones (0.45 to 0.90). Genetic correlations between DO and calving to first insemination interval, calving interval and number of inseminations for pregnancy were 0.98, 0.99 and 0.39, respectively. Genetic correlations of WW with reproductive traits varied between 0.04 and 0.07. As a conclusion, estimated heritability for reproductive traits was low, genetic correlations among reproductive traits were high and its genetic correlation with weaning weight was low.

Descargar archivo digital: Covarianza entre reprod y PD Cebú Cuba-Téc Pecu Méx 2008.pdf